<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>熊猫UI</title>
    <style>
        *{margin: 0; padding: 0; box-sizing: border-box;}
        img {max-width: 100%;}
        :root {
           --button-height:32px;
           --font-size:14px;
           --button-bg: white;
           --button-active-bg: #eee;
           --border-radius: 4px;
           --color: #333;
           --border-color: #999;
           --border-color-hover: #666;
        }
        #app {
        }
        body {
            font-size: var(--font-size);
        }
    </style>
</head>
<body>
  <div id="app" style="padding: 100px;">
    <g-collapse :selected.sync="selectedTab">
      <g-collapse-item title="标题1" name="1">内容1</g-collapse-item>
      <g-collapse-item title="标题2" name="2">内容2</g-collapse-item>
      <g-collapse-item title="标题3" name="3">内容3</g-collapse-item>
    </g-collapse>
    {{selectedTab}}
  </div>
    <script src='./src/app.js'></script>
</body>
</html>